CN204244192U - LC filter circuit and high-frequency model - Google Patents
LC filter circuit and high-frequency model Download PDFInfo
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- CN204244192U CN204244192U CN201290000758.XU CN201290000758U CN204244192U CN 204244192 U CN204244192 U CN 204244192U CN 201290000758 U CN201290000758 U CN 201290000758U CN 204244192 U CN204244192 U CN 204244192U
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
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Abstract
The utility model provides a kind of insertion loss lower and can obtain the small-sized LC filter circuit of rapid attenuation characteristic.1st input and output terminal (P1) is connected by holding wire (100) with the 2nd input and output terminal (P2).Holding wire (100) is connected to ground connection via the 1st inductor (101).2nd inductor (102) forms LC parallel circuits (10) together with capacitor (103).LC parallel circuits (10) is connected to ground connection.1st inductor (101) and the 2nd inductor (102) are configured to carry out magnetic Field Coupling with mutual inductance M.Now, the 1st inductor (101) and the 2nd inductor (102) are configured to pass magnetic Field Coupling and make mutual inductance act on each inductor with-M.
Description
Technical field
The utility model relates to a kind of the LC filter circuit and the high-frequency model that possess LC antiresonant circuit.
Background technology
In the moving body communication apparatus such as mobile phone, use small-sized low-loss and the multilayer filter circuit of production excellence (for example, referring to patent documentation 1).Fig. 1 is the circuit diagram of the LC filter circuit that patent documentation 1 uses.
In circuit shown in Fig. 1, between the holding wire and ground connection of connection the 1st input and output terminal P1 and the 2nd input and output terminal P2, be inserted with the LC antiresonant circuit be made up of inductor L11 and capacitor C11.LC antiresonant circuit has the impedance operator becoming maximum (infinity) in the resonance frequency place circuit impedance of this resonant circuit, and the signal that therefore this characteristic can be utilized to make to comprise the frequency band of this resonance frequency passes through.
Prior art document
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2003-258587 publication
Utility model content
Utility model technical problem to be solved
As mentioned above, when forming the filter circuit making special frequency band pass through, (following by the characteristic realizing obtaining in the end of special frequency band (passband) rapid attenuation, this characteristic is called rapid attenuation characteristic), can prevent passband width from unnecessarily broadening.By realizing this characteristic, such as, though the signal of communication wanting to make it pass through with want the frequency band of the signal of communication making it decay to be close, also can only make the signal of communication wanting to pass through pass through.
But when use comprises the filter circuit of LC antiresonant circuit of Fig. 1, attenuation characteristic can be made to become precipitous, but the attenuation of passband also can increase by the electric capacity increasing capacitor C11, insertion loss becomes large.On the other hand, insertion loss can be made to diminish, but in this case, attenuation characteristic becomes mild by the inductance increasing inductor L11,3dB frequency bandwidth becomes wide.Therefore, in the existing filter circuit shown in Fig. 1, the filter that the signal of communication near service band reliably can be separated each other cannot be realized.
Further, in order to increase the inductance of inductor L11, the design alteration must carrying out that the number of turn of the conductor of inductor L11 is increased etc., this will inevitably produce the large tendency of size changing circuit.Therefore, when inductance has the upper limit, consider from the angle of circuit size, sacrifice to a certain degree must be made for insertion loss.
In view of the above problems, the purpose of this utility model is to provide a kind of insertion loss lower and can obtains small-sized LC filter circuit and the high-frequency model of rapid attenuation characteristic.
The technical scheme that technical solution problem adopts
LC filter circuit of the present utility model, possesses: the 1st inductor, the 1st end of the 1st inductor be connected the holding wire of the 1st input and output terminal with the 2nd input and output terminal and be connected; And LC parallel circuits, this LC parallel circuits is made up of the 2nd inductor and the capacitor that is parallel to the 2nd inductor.1st inductor and the 2nd inductor configuration are for carrying out magnetic Field Coupling.2nd inductor of LC parallel circuits and a tie point ground connection of capacitor or via capacitor, inductor ground connection.
In the structure shown here, the 1st inductor carries out magnetic Field Coupling with the 2nd inductor forming LC parallel circuits, thus forms mutual inductance.Thus, these three circuit elements of the 1st inductor, the 2nd inductor and capacitor are only utilized can to form the filter circuit formed by the 1st inductor, the 2nd inductor, mutual inductance and capacitor four circuit elements.Therefore, when not increasing the actual circuit element number be formed on duplexer, attenuation characteristic, the attenuation pole that only cannot be realized by the combination of an inductor and a LC parallel circuits just can be realized.
In addition, in LC filter circuit of the present utility model, preferably the 1st inductor with the 2nd end ground connection of the 1st opposition side, end or via the element ground such as capacitor, inductor.
For this structure, an example of concrete LC filter circuit is shown.In the structure shown here, between holding wire and ground connection, be connected with the 1st inductor, thus the 2nd inductor of formation LC parallel circuits and the 1st inductor carry out the circuit structure of magnetic Field Coupling.By this circuit structure, following filter can be formed, that is: using special frequency band as passband and frequency becomes attenuation band higher than the high frequency side of this passband and frequency lower than the lower frequency side of this passband.In addition, as described later, by designing rightly each circuit element, can realize following characteristic, that is: the attenuation characteristic of lower frequency side sharply tilts, and has attenuation pole at the high frequency side of passband.That is, can realize can preventing passband width from unnecessarily broadening and striving for the filter circuit of the attenuation at passband two ends.
In addition, in LC filter circuit of the present utility model, preferably the inductance of the 2nd inductor is greater than the inductance of the 1st inductor.
According to this structure, can more effectively realize above-mentioned characteristic.
In addition, the capacitor of preferred LC filter circuit of the present utility model is the capacitor parasitics of the 2nd inductor.
According to this structure, further, also actually on duplexer can not form capacitor, and realize on circuit, thus can be miniaturized further.
In addition, high-frequency model of the present utility model, is formed by the structure of LC filter circuit.High-frequency model comprises: duplexer, and this duplexer is laminated with multiple dielectric layer; And conductive pattern, this conductive pattern is arranged on the dielectric layer, forms the 1st inductor, the 2nd inductor and capacitor.The conductive pattern being preferably formed the 1st inductor is relative at least partially along the stacked direction of duplexer with the conductive pattern forming the 2nd inductor.
For this structure, the concrete structure example of the high-frequency model that above-mentioned filter circuit is formed is shown.
In addition, high-frequency model of the present utility model, has the structure of multiple LC filter circuit.High-frequency model comprises: duplexer, and this duplexer is laminated with multiple dielectric layer; And conductive pattern, this conductive pattern is arranged on the dielectric layer, forms the 1st inductor, the 2nd inductor and capacitor.Be preferably formed the conductive pattern of the 1st inductor and the conductive pattern forming the 2nd inductor, in each circuit of multiple LC filter circuit, the stacked direction along duplexer is relative at least partially.
For this structure, the concrete structure example of the high-frequency model be made up of multiple above-mentioned filter circuit is shown.
Utility model effect
According to the utility model, can with simple circuit structure and miniaturization to form insertion loss lower and can obtain the LC filter circuit of rapid attenuation characteristic.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the LC filter circuit that patent documentation 1 uses.
Fig. 2 is the circuit diagram of the LC filter circuit 1 involved by the 1st execution mode.
Fig. 3 is the transmission characteristic figure of LC filter circuit 1 involved by the 1st execution mode and existing LC filter circuit.
Fig. 4 is the equivalent circuit diagram taken into account by the mutual inductance M of the LC filter circuit 10 involved by the 1st execution mode.
Fig. 5 is the circuit diagram of the LC filter circuit 1A involved by the 2nd execution mode.
Fig. 6 is the transmission characteristic figure of the LC filter circuit 1A involved by the 2nd execution mode.
Fig. 7 is the stacked figure of a part for the high-frequency model of the LC filter circuit 1A possessed involved by the 2nd execution mode.
Fig. 8 is the stacked figure of a part for the high-frequency model of the LC filter circuit 1A possessed involved by the 2nd execution mode.
Fig. 9 is the stacked figure of a part for the high-frequency model of the LC filter circuit 1A possessed involved by the 2nd execution mode.
Embodiment
With reference to accompanying drawing, the filter circuit involved by the utility model the 1st execution mode is described.Fig. 2 is the circuit diagram of the LC filter circuit 1 involved by the 1st execution mode.
LC filter circuit 1 possesses the 1st input and output terminal P1 and the 2nd input and output terminal P2.1st input and output terminal P1 is connected by holding wire 100 with the 2nd input and output terminal P2.1st end of the 1st inductor 101 is connected to holding wire 100, is connected to ground connection (ground connection) with the 2nd end of the 1st end opposite side.The inductance of the 1st inductor 101 is L1.
1st end of the 2nd inductor 102 is connected with the 1st end of capacitor 103, and the 2nd end of the 2nd inductor 102 is connected with the 2nd end of capacitor 103.Thus, the LC parallel circuits 10 of the 2nd inductor 102 and capacitor 103 is formed.2nd inductor 102 of LC parallel circuits 10 and the 2nd end tie point ground connection each other of capacitor 103.The inductance of the 2nd inductor 102 is L2, and the electric capacity of capacitor 103 is C1.
By the structure in duplexer described later, 1st inductor 101 and the 2nd inductor 102 are configured, make both carry out magnetic Field Coupling.Thus, between the 1st inductor 101 and the 2nd inductor 102, mutual inductance M is produced.Now, the 1st inductor 101 and the 2nd inductor 102 are configured to pass magnetic Field Coupling and make mutual inductance act on each inductor with-M.
The LC filter circuit 1 formed by this structure has following transmission characteristic (by characteristic S (2,1) and reflection characteristic S (1,1)).The transmission characteristic figure of Fig. 3 (A) to be the transmission characteristic figure of the LC filter circuit 1 involved by the 1st execution mode, Fig. 3 (B) be existing LC filter circuit shown in Fig. 2.In addition, Fig. 3 (A), Fig. 3 (B) are analog results, are set as that 2.5GHz becomes the centre frequency of passband.
Following setting is used to be used as the setting of concrete component value.
In Fig. 3 (A), 1st, the 2nd input and output terminal P1, P2 is set as 50 Ω terminals, the inductance L 1 of the 1st inductor 101 is set as 1.0nH, and the inductance L 2 of the 2nd inductor 102 is set as 8.0nH, and the internal resistance of the 1st, the 2nd inductor 101,102 is set as 10 Ω.In addition, the electric capacity C1 of capacitor 103 is set as 0.5pF, and the internal resistance of the parallel circuits be made up of inductor 102 and capacitor 103 is set as 10 Ω.In addition, in Fig. 3 (B), inductance is set as 1nH, and capacitance settings is 6.0pF.
If use the structure of present embodiment, then, as shown in Fig. 3 (A), the frequency range of passband can be made to narrow, in the attenuation characteristic that the lower frequency side of passband and high frequency side can realize rapidly.Especially, attenuation pole can be formed at high frequency side.So in such an embodiment, three dB bandwidth is 640MHz.Here, three dB bandwidth represent with the attenuation by the minimum frequency of loss be benchmark, attenuation is the frequency range of-3dB.In addition, insertion loss IL is 0.56dB.
On the other hand, when using existing structure, as shown in Fig. 3 (B), the frequency range of passband becomes wide, and the lower frequency side of passband and these both sides of high frequency side have mild attenuation characteristic.So in this existing structure, three dB bandwidth is 1980MHz, and insertion loss is 1.53dB.
As mentioned above, if use the structure of present embodiment, then passband can be realized to obtain rapid attenuation characteristic as narrow-band at the lower frequency side of passband and high frequency side, and the LC filter circuit that insertion loss is less.That is, the LC filter circuit of transmission characteristic excellence can be realized.Especially, if the attenuation pole of high frequency side is set as with use the communication module being provided with this LC filter circuit to carry out to receive and dispatch, the frequency band of other signals of communication of utilizing side frequency is roughly consistent, then the isolation between the transmission circuit can guaranteeing transmitting-receiving two kinds of signals of communication fully.
This is because the LC filter circuit 1 of present embodiment has identical circuit structure with following equivalent electric circuit, thus can realize above-mentioned effect.By the electromagnetic field couples of the 1st inductor 101 and the 2nd inductor 102, LC filter circuit 1 can be considered as the equivalent electric circuit shown in Fig. 4.Fig. 4 is the equivalent circuit diagram taken into account by the mutual inductance M of the LC filter circuit 1 involved by the 1st execution mode.
As in the LC filter circuit 1 of equivalent electric circuit, the 1st end of the inductor 111 formed by inductance (L1-M) is connected with holding wire.2nd end of this inductor 111 is connected with the 1st end of the inductor 113 formed by inductance M, and the 1st end of the inductor 112 formed by inductance (L2-M).2nd end of inductor 112 is connected with the 1st end of the capacitor 103 formed by electric capacity C1.2nd end of inductor 113 and the 2nd end ground connection of capacitor 103.Thus, the parallel circuits be made up of the inductor 113 of the inductor 112 of inductance (L2-M) and the LC series circuit of capacitor 103 and inductance M is formed.
In this circuit structure, at the lower frequency side of passband, the magnetic Field Coupling between the 1st inductor 101 and the 2nd inductor 102 is more weak, and the 1st inductor being therefore connected directly to holding wire significantly contributes to the transmission characteristic of LC filter circuit 1.Further, due to be low frequency, the 1st inductance L 1 is less than the 2nd inductance L 2 and value is less, the impedance being therefore connected to the circuit of ground connection via the 1st inductor 101 from holding wire 100 is also relatively little.Therefore, in holding wire 100, the signal of transmission has the characteristic easily flowing to ground connection via the 1st inductor 101.Thus, in the lower frequency side formation of passband, there is the attenuation of regulation and the decay territory of attenuation characteristic.
Then, must consider the existence of mutual inductance M in passband, the antiresonant circuit of the inductance 112 of the inductor 113 of mutual inductance M and inductance (L2-M) and the capacitor 103 of electric capacity C1 significantly contributes to the transmission characteristic of LC filter circuit 1.At the resonance frequency place of antiresonant circuit, the impedance of parallel circuits is maximum.Therefore, in passband, if observe ground side from holding wire 100, then can be considered that the inductor 111 of inductance (L1-M) is connected with the antiresonant circuit with large impedance.Thus, in passband, in the frequency band corresponding with this resonance frequency, can be considered from holding wire 100 to ground side and be connected with larger impedance, signal of communication transmits undampedly between the 1st, the 2nd input and output terminal.Further, because mutual inductance M is without conductor losses, therefore the Q value of antiresonant circuit is very high.Thus can narrow-band be realized and the less filter of decay in passband.
Then, at the high frequency side that frequency ratio passband is high, also must consider the existence of mutual inductance M, the series resonant circuit be made up of the inductor 111 of inductance (L1-M), the inductor 112 of inductance (L2-M) and the capacitor of electric capacity C1 significantly contributes to the transmission characteristic of LC filter circuit 1.At the resonance frequency place of series resonant circuit, impedance is minimum, and in resonance frequency, signal of communication almost all flows to ground connection.Therefore, between the 1st, the 2nd input and output terminal, transmit communications signals hardly.Roughly consistent by this resonance frequency being set to the frequency of other signal of communication near the high frequency side with passband, especially adjacent, the attenuation characteristic of high frequency side can be made to promote.
And, as mentioned above, by utilizing foregoing circuit structure to realize LC filter circuit 1, can by three circuit elements of the 1st inductor 101, the 2nd inductor 102, capacitor 103 realize by inductor 111, inductor 112,113, the circuit that formed of capacitor 103 4 circuit elements.That is, by only forming three circuit elements on duplexer, the LC filter circuit 10 be made up of four circuit elements can be realized.Thus, with form the situation of four circuit elements on duplexer compared with, miniaturization can be realized.
As mentioned above, by using the structure of present embodiment, the miniaturization of the LC filter circuit that passband is narrower, attenuation characteristic is excellent, insertion loss is lower can be realized.
Then, with reference to accompanying drawing, the LC filter circuit involved by the utility model the 2nd execution mode is described.Fig. 5 is the circuit diagram of the LC filter circuit 1A involved by the 2nd execution mode.The structure of the LC filter circuit 1A of present embodiment comprises the LC filter circuit 1 utilizing mutual inductance shown in two the 1st execution modes.
Between the 1st input and output terminal P1 and the 2nd input and output terminal P2, from the 1st input and output terminal P1 side, be in series with capacitor 105, inductor 104, capacitor 106.
Capacitor 105 is connected to ground connection with the tie point of inductor 104 via inductor 101A, capacitor 200.Inductor 102A is formed and is configured so that inductor 102A and inductor 101A carries out magnetic Field Coupling, thus produces mutual inductance M1.Now, inductor 101A and inductor 102A is configured to pass magnetic Field Coupling and makes mutual inductance act on each inductor with-M1.1st end of capacitor 103A is connected to the 1st end of inductor 102A, and the 2nd end of capacitor 103A is connected to the 2nd end of inductor 102A.Thus, the parallel circuits of inductor 102A and capacitor 103A is formed.Inductor 102A and capacitor 103A the 2nd end is separately connected to ground connection via capacitor 200.
Inductor 104 is connected to ground connection with the tie point of capacitor 106 via inductor 101B, capacitor 200.Inductor 102B is formed and is configured so that inductor 102B and inductor 101B carries out magnetic Field Coupling, thus produces mutual inductance M2.Now, inductor 101B and inductor 102B is configured to pass magnetic Field Coupling and makes mutual inductance act on each inductor with-M2.1st end of capacitor 103B is connected to the 1st end of inductor 102B, and the 2nd end of capacitor 103B is connected to the 2nd end of inductor 102B.Thus, the parallel circuits of inductor 102B and capacitor 103B is formed.Inductor 102B and capacitor 103B the 2nd end is separately connected to ground connection via capacitor 200.
Here, inductor 101A, 101B are equivalent to above-mentioned 1st inductor, and inductor 102A, 102B are equivalent to above-mentioned 2nd inductor.
The LC filter circuit 1A formed by this structure has following transmission characteristic (by characteristic S (2,1) and reflection characteristic S (1,1)).Fig. 6 is the transmission characteristic figure of the LC filter circuit 1A involved by the 2nd execution mode.In addition, Fig. 6 is experimental result, is set to the centre frequency becoming passband near 2.4GHz.
As shown in Figure 6, by using the LC filter circuit 1A that formed by the structure of present embodiment, insertion loss can be realized and can not worsen and the larger LC filter circuit of the attenuation of attenuation band.Especially, by adopting the circuit structure shown in Fig. 5, all form attenuation pole at the lower frequency side of passband and these both sides of high frequency side.Therefore, if be set as by this attenuation pole roughly consistent with the frequency band of the multiple signals of communication utilizing frequency band adjacent, then the high-frequency front-end circuit of the isolation can more effectively guaranteed between the circuit of multiple signal of communication can be realized.
Possess the high-frequency model of this LC filter circuit 1A, realize as mentioned above by duplexer, each inductor and capacitor are formed by following shape.
Fig. 7, Fig. 8, Fig. 9 are the stacked figure of a part for the high-frequency model of the LC filter circuit 1A possessed involved by the 2nd execution mode.In Fig. 7 and Fig. 8, inductor 101A, 101B, 102A, the 102B shown in Fig. 5 is only shown.In fig .9, the capacitor 200 shown in Fig. 5 is only shown.
In each dielectric layer shown in Fig. 7 (A) to Fig. 7 (D), the electrode pattern forming the open loop shape of inductor 101A, 101B is formed as making electrode pattern coincidence at least partially each other in the stacking direction.By utilizing through hole electrode to be connected by the electrode pattern of each layer in the stacking direction, it is axial spiral-shaped that the electrode pattern of each layer is formed as with stacked direction.Inductor 101A, 101B are connected with earthing potential from the dielectric layer shown in Fig. 7 (D) through the electrode pattern of capacitor 200 as shown in Figure 9.
In each dielectric layer shown in Fig. 8 (A) to Fig. 8 (D), the electrode pattern forming the open loop shape of inductor 102A, 102B is formed as making electrode pattern coincidence at least partially each other in the stacking direction.By utilizing through hole electrode to be connected by the electrode pattern of each layer in the stacking direction, it is axial spiral-shaped that the electrode pattern of each layer is formed as with stacked direction.Inductor 102A, 102B are connected with earthing potential from the dielectric layer shown in Fig. 8 (D) through the electrode pattern of capacitor 200 as shown in Figure 9.
In each dielectric layer shown in Fig. 9, be formed as plane electrode pattern 200A relative with internal layer grounding electrode GND.Utilize this structure to form capacitor 200.
Now, the electrode pattern forming inductor 101A is formed as, relative to electrode pattern, the in the stacking direction electrode pattern coincidence at least partially each other forming inductor 102A.By changing the distance of the overlapping area between the electrode pattern forming inductor 101A and the electrode pattern forming inductor 102A and the stacked direction between electrode pattern, suitably can adjust the value of the mutual inductance M1 produced between inductor 101A and inductor 102A, thus the characteristic of LC filter 1A can be adjusted as required.
Similarly, the electrode pattern forming inductor 101B is formed as, relative to electrode pattern, the in the stacking direction electrode pattern coincidence at least partially each other forming inductor 102B.By changing the distance of the overlapping area between the electrode pattern forming inductor 101B and the electrode pattern forming inductor 102B and the stacked direction between electrode pattern, suitably can adjust the value of the mutual inductance M1 produced between inductor 101B and inductor 102B, thus the characteristic of LC filter 1A can be adjusted as required.
Further, the capacitor 103A shown in Fig. 5 is realized by capacitor parasitics, and this capacitor parasitics is overlapped along stacked direction with the electrode pattern 200A of capacitor 200 by the electrode pattern of inductor 102A and produces.In addition, the capacitor 103B shown in Fig. 5 also capacitor parasitics realizes, and this capacitor parasitics is overlapped along stacked direction with the electrode pattern 200A of capacitor 200 by the electrode pattern of inductor 102B and produces.Utilize this overlapping area and the number of plies of the interelectrode dielectric layer coincided, can obtain as the electric capacity needed for LC filter circuit 1A.
Here, as mentioned above, if electric capacity becomes large, insertion loss becomes large, therefore in the LC filter circuit 1A involved by present embodiment, as long as obtain the electric capacity of prescribed limit with required Min..Therefore, if use the structure of the electrode pattern shown in Fig. 7, Fig. 8, Fig. 9, the capacitor parasitics produced between inductor 102A, 102B and capacitor 200 is utilized to realize capacitor 103A, 103B, then can realize the miniaturization of the electrode structure needed for structure of following present embodiment, that is: the electric capacity of capacitor 103A, 103B is set to required Min., and the inductance increasing inductor 102A, 102B is for improving insertion loss.
In addition, as explained above, due to possess the LC filter circuit of present embodiment high-frequency model can in be located at LTCC (Low Temperature Co-fired Ceramics: LTCC), therefore the SAW filter of identical narrow-band by characteristic can be realized with possessing in addition, and the high-frequency model this SAW filter being arranged on the shape of duplexer end face is compared, the high-frequency model possessing the LC filter circuit of present embodiment can be more miniaturized.
In addition, in above-mentioned 2nd execution mode, show the example possessing the LC filter circuit shown in two the 1st execution modes, but also can be more than three.
In addition, inductance shown in above-mentioned execution mode or electric capacity are examples of the structure for realizing present embodiment, as LC filter circuit, also inductance or electric capacity suitably can be set to other value, to make it possible to the feature obtaining above-mentioned the utility model application.
Label declaration
1,1A LC filter circuit
10,10A, 10B LC parallel circuits
100 holding wires
101 the 1st inductors
102 the 2nd inductors
103,103A, 103B, 200 capacitors
101A, 101B, 102A, 102B, 104 inductors
Claims (5)
1. a LC filter circuit, is characterized in that, comprising:
1st inductor, the 1st end of the 1st inductor be connected the holding wire of the 1st input and output terminal with the 2nd input and output terminal and be connected; And
LC parallel circuits, this LC parallel circuits is made up of the 2nd inductor and the capacitor that is parallel to the 2nd inductor,
Described 1st inductor becomes to carry out magnetic Field Coupling with described 2nd inductor configuration,
2nd inductor of described LC parallel circuits and a tie point ground connection of capacitor or via capacitor, inductor ground connection,
The inductance of described 2nd inductor is greater than the inductance of described 1st inductor.
2. LC filter circuit as claimed in claim 1, is characterized in that,
Described 1st inductor with the 2nd end ground connection of described 1st opposition side, end or via capacitor, inductor ground connection.
3. LC filter circuit as claimed in claim 1 or 2, is characterized in that,
Described capacitor is the capacitor parasitics of described 2nd inductor.
4. a high-frequency model, is characterized in that,
Described high-frequency model is formed by the structure of the LC filter circuit as described in any one of claims 1 to 3, comprising:
Duplexer, this duplexer is laminated with multiple dielectric layer; And
Conductive pattern, this conductive pattern is arranged on said dielectric layer, and forms described 1st inductor, described 2nd inductor and described capacitor,
Along the stacked direction of described duplexer, the conductive pattern forming described 1st inductor is relative at least partially with the conductive pattern forming described 2nd inductor.
5. a high-frequency model, is characterized in that,
Described high-frequency model has the structure of multiple LC filter circuit as described in any one of claims 1 to 3, comprising:
Duplexer, this duplexer is laminated with multiple dielectric layer; And
Conductive pattern, this conductive pattern is arranged on said dielectric layer, and forms described 1st inductor, described 2nd inductor and described capacitor,
In each circuit of multiple LC filter circuit, along the stacked direction of described duplexer, the conductive pattern forming described 1st inductor is relative at least partially with the conductive pattern forming described 2nd inductor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-244044 | 2011-11-08 | ||
| JP2011244044 | 2011-11-08 | ||
| PCT/JP2012/077933 WO2013069498A1 (en) | 2011-11-08 | 2012-10-30 | Lc filter circuit and high-frequency module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244192U true CN204244192U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201290000758.XU Expired - Lifetime CN204244192U (en) | 2011-11-08 | 2012-10-30 | LC filter circuit and high-frequency model |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5804076B2 (en) |
| CN (1) | CN204244192U (en) |
| TW (1) | TWI517570B (en) |
| WO (1) | WO2013069498A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431467A (en) * | 2015-04-17 | 2017-12-01 | 株式会社村田制作所 | Resonance circuit, bandstop filter and bandpass filter |
| CN113228503A (en) * | 2018-12-20 | 2021-08-06 | 阿维科斯公司 | Multilayer electronic device including high-precision inductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5874718B2 (en) * | 2013-12-06 | 2016-03-02 | 株式会社村田製作所 | Frequency variable resonance circuit and frequency variable filter |
| CN104735908A (en) * | 2013-12-18 | 2015-06-24 | 深圳富泰宏精密工业有限公司 | Printed circuit board |
| WO2018180150A1 (en) | 2017-03-29 | 2018-10-04 | 株式会社村田製作所 | Trap filter and filter circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS4847240A (en) * | 1971-10-18 | 1973-07-05 | ||
| JPS607849B2 (en) * | 1979-02-26 | 1985-02-27 | マスプロ電工株式会社 | Interference rejection filter |
| JPS6029231Y2 (en) * | 1980-01-21 | 1985-09-04 | デイエツクスアンテナ株式会社 | filter |
| JPS57162509A (en) * | 1981-03-31 | 1982-10-06 | Tohoku Metal Ind Ltd | Trap |
| JP2542842Y2 (en) * | 1991-12-24 | 1997-07-30 | 太陽誘電株式会社 | Laminated composite parts |
| JP3612118B2 (en) * | 1995-08-03 | 2005-01-19 | 株式会社ソキア | SMA LC filter |
| JP2008147709A (en) * | 2005-02-25 | 2008-06-26 | Murata Mfg Co Ltd | Lc filter |
| JP2006246123A (en) * | 2005-03-04 | 2006-09-14 | Kyocera Corp | Laminated noise filter |
| TW200908430A (en) * | 2007-05-18 | 2009-02-16 | Murata Manufacturing Co | Stacked bandpass filter |
| JP5540912B2 (en) * | 2009-08-12 | 2014-07-02 | 株式会社村田製作所 | Multilayer filter |
| WO2011114851A1 (en) * | 2010-03-18 | 2011-09-22 | 株式会社村田製作所 | High-frequency laminated component and laminated type high-frequency filter |
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2012
- 2012-10-30 WO PCT/JP2012/077933 patent/WO2013069498A1/en active Application Filing
- 2012-10-30 JP JP2013542933A patent/JP5804076B2/en active Active
- 2012-10-30 CN CN201290000758.XU patent/CN204244192U/en not_active Expired - Lifetime
- 2012-11-07 TW TW101141273A patent/TWI517570B/en active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431467A (en) * | 2015-04-17 | 2017-12-01 | 株式会社村田制作所 | Resonance circuit, bandstop filter and bandpass filter |
| CN113228503A (en) * | 2018-12-20 | 2021-08-06 | 阿维科斯公司 | Multilayer electronic device including high-precision inductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5804076B2 (en) | 2015-11-04 |
| TWI517570B (en) | 2016-01-11 |
| JPWO2013069498A1 (en) | 2015-04-02 |
| TW201320591A (en) | 2013-05-16 |
| WO2013069498A1 (en) | 2013-05-16 |
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